obama's national security advisor. he is now a distinguished fellow at the council on foreign relations. he joins me to talk about recent developments and the issues he was deeply involved in at the white house from iran to winding down the war in afghanistan to mitigating tensions between china and japan. welcome back to the show. >> great to see you. >> let's 23irs talk about iran, you were deeply involved in this whole policy, it appears that what we're saying is we need iran to essentially shut downing parts of its nuclear program so that it cannot have the kind of breakout capacity that -- he says we are not going to dismantle a single thing, we're willing to freeze, we're willing to have everything monitored, but no dismantling, how do you bridge those two positions? >> the reason we're here is the enormous pressure that was put on -- president rowhani took a max mallist stand. they're going to have to assure the international community in very concrete, verifiable and solid ways that they're not working on a nuc